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No just i have 2 coils with capacity of 60,1 and 16,6 KW and one other has the exchange surface 62,4 Sq.meters

i guess i don't understand. hopefuly someone else can help better than i can. what is the 6 kw? 2 coils with the capacity of 60 what? no manufacturer name or model number is on these anywhere? are these coils supplied by the customer? maybe a supply house can help you.

i guess i don't understand. hopefuly someone else can help better than i can. what is the 6 kw? 2 coils with the capacity of 60 what? no manufacturer name or model number is on these anywhere? are these coils supplied by the customer? maybe a supply house can help you.

Best bet in this scenario is to measure the number of rows, tube size, face area and fin density (count the number of fins in 10cm). Then give that information along with the flow and return temps as well as entering air conditions to your air handling vendor and ask him to estimate the performance based on a similar coil tha he currently manufactures and derate what he gives you by 5-10% to account for degraded condition of existing equipment.